Fixes Undefined index: searchResult when the response content is empty or not valid json
Fixes Undefined index: searchResult when the response content is empty or not valid json

FACT-Finder/FACT-Finder-PHP-Library,FACT-Finder/FACT-Finder-PHP-Library,Seidemann-Web/FACT-Finder-PHP-Library,Seidemann-Web/FACT-Finder-PHP-Library